Seat unit



FIG. 1 is a front elevational view of a seat unit showing my design;

FIG. 2 is a rear elevational view of the seat unit;

FIG. 3 is a top plan view of the seat unit;

FIG. 4 is a bottom plan view of the seat unit;

FIG. 5 is a left side elevational view of the seat unit;

FIG. 6 is a right side elevational view of the seat unit;

FIG. 7 is a cross-sectional view of the seat unit taken along line 7-7 in FIG. 6;

FIG. 8 is a cross-sectional view of the seat unit taken along line 8-8 in FIG. 3; and,

FIG. 9 is an enlarged portion corresponding to window 9 in FIG. 8.

Throughout the Figures, portions represented by broken lines are not part of the claimed design. 

CLAIM The ornamental design for a seat unit, as shown and described. 